Chapter 1: The Living World – MCQs with Answers & Explanations

CBSE Class 11 Biology MCQs with Answers & Explanations – Chapter 1: The Living World (NCERT Based)

Course Details

Course: CBSE Class 11 Biology
Syllabus: NCERT
Unit: Unit I – Diversity in Living World
Chapter: Chapter 1 – The Living World
CBSE Board Examination: Central Board of Secondary Education – Class 11 (School & Annual Examinations)

CBSE Class 11 Biology Chapter 1 The Living World – 40 MCQs with Answers & Explanations (NCERT)

Section A: Characteristics of Living Organisms (MCQs 1–10)

1. Which of the following is a defining characteristic of living organisms?
   A. Growth
   B. Reproduction
   C. Metabolism
   D. Movement
   Correct Answer: C
   Explanation: Metabolism occurs only in living cells and is absent in non-living objects, making it a defining feature.
2. Which process represents catabolism?
   A. Photosynthesis
   B. Protein synthesis
   C. Respiration
   D. Cell division
   Correct Answer: C
   Explanation: Respiration breaks down complex molecules to release energy, which is catabolism.
3. Why is reproduction not considered a defining feature of life?
   A. All organisms reproduce
   B. Some living organisms do not reproduce
   C. Reproduction is external
   D. It occurs only in animals
   Correct Answer: B
   Explanation: Organisms like mules do not reproduce but are still living.
4. Growth in living organisms occurs due to:
   A. External deposition
   B. Cell division
   C. Crystallization
   D. Absorption
   Correct Answer: B
   Explanation: Living organisms grow internally through cell division.
5. Which feature distinguishes living from non-living objects?
   A. Increase in size
   B. Presence of mass
   C. Metabolic reactions
   D. Shape
   Correct Answer: C
   Explanation: Metabolic reactions are exclusive to living organisms.
6. Responsiveness to stimuli is known as:
   A. Growth
   B. Consciousness
   C. Reproduction
   D. Metabolism
   Correct Answer: B
   Explanation: Consciousness refers to the ability to respond to environmental stimuli.
7. Which of the following shows consciousness?
   A. Rock
   B. Crystal
   C. Plant
   D. Cloud
   Correct Answer: C
   Explanation: Plants respond to stimuli like light and gravity.
8. Viruses are considered borderline between living and non-living because they:
   A. Are multicellular
   B. Reproduce independently
   C. Are inert outside host cells
   D. Have metabolism outside host
   Correct Answer: C
   Explanation: Viruses remain inactive outside host cells.
9. Which property of life is demonstrated by enzyme activity inside cells?
   A. Growth
   B. Reproduction
   C. Metabolism
   D. Movement
   Correct Answer: C
   Explanation: Enzyme activity is part of metabolic reactions.
10. Cellular organization means:
    A. Presence of tissues
    B. Presence of organs
    C. Presence of cells
    D. Presence of nucleus
    Correct Answer: C
    Explanation: All living organisms are made up of one or more cells.

Section B: Diversity and Classification (MCQs 11–20)

11. The variety of living organisms on Earth is called:
    A. Taxonomy
    B. Biodiversity
    C. Classification
    D. Systematics
    Correct Answer: B
    Explanation: Biodiversity refers to the variety of life forms.
12. Why is classification important?
    A. To name organisms
    B. To group organisms systematically
    C. To destroy organisms
    D. To isolate organisms
    Correct Answer: B
    Explanation: Classification organizes organisms for easier study.
13. Classification based on a few observable characters is called:
    A. Natural classification
    B. Phylogenetic classification
    C. Artificial classification
    D. Numerical classification
    Correct Answer: C
    Explanation: Artificial classification uses limited characters.
14. Natural classification is based on:
    A. Habitat only
    B. Colour only
    C. Multiple characters
    D. Size only
    Correct Answer: C
    Explanation: Natural classification considers many characteristics.
15. Which branch deals with identification, naming, and classification?
    A. Ecology
    B. Genetics
    C. Taxonomy
    D. Anatomy
    Correct Answer: C
    Explanation: Taxonomy includes identification, nomenclature, and classification.
16. Systematics includes the study of:
    A. Only classification
    B. Evolutionary relationships
    C. Habitat only
    D. Nutrition only
    Correct Answer: B
    Explanation: Systematics studies diversity and evolutionary relationships.
17. Evolutionary history of organisms is called:
    A. Taxonomy
    B. Systematics
    C. Phylogeny
    D. Morphology
    Correct Answer: C
    Explanation: Phylogeny refers to evolutionary history.
18. Modern classification uses which data?
    A. Morphology only
    B. Anatomy only
    C. Molecular data
    D. Habitat
    Correct Answer: C
    Explanation: Molecular data helps establish evolutionary relationships.
19. Classification helps in predicting:
    A. Habitat
    B. Behaviour
    C. Characteristics
    D. Size
    Correct Answer: C
    Explanation: Organisms in a group share common traits.
20. Which is the largest taxonomic category?
    A. Species
    B. Genus
    C. Family
    D. Kingdom
    Correct Answer: D
    Explanation: Kingdom is the highest rank.

Section C: Nomenclature and Taxonomic Hierarchy (MCQs 21–30)

21. Scientific naming of organisms is called:
    A. Classification
    B. Taxonomy
    C. Nomenclature
    D. Systematics
    Correct Answer: C
    Explanation: Nomenclature deals with naming organisms.
22. Binomial nomenclature consists of:
    A. One word
    B. Two words
    C. Three words
    D. Four words
    Correct Answer: B
    Explanation: It includes genus and species.
23. Who proposed binomial nomenclature?
    A. Darwin
    B. Linnaeus
    C. Aristotle
    D. Mendel
    Correct Answer: B
    Explanation: Carolus Linnaeus introduced binomial nomenclature.
24. Scientific names are written in:
    A. English
    B. Hindi
    C. Latin
    D. Greek
    Correct Answer: C
    Explanation: Latin ensures universal acceptance.
25. In Mangifera indica, Mangifera represents:
    A. Species
    B. Family
    C. Genus
    D. Order
    Correct Answer: C
    Explanation: The first word is the genus.
26. Which is the correct way of writing a scientific name?
    A. mangifera Indica
    B. Mangifera Indica
    C. Mangifera indica
    D. mangifera indica
    Correct Answer: C
    Explanation: Genus capitalized, species lowercase, italicized.
27. The smallest taxonomic unit is:
    A. Genus
    B. Family
    C. Species
    D. Order
    Correct Answer: C
    Explanation: Species is the basic unit.
28. A group of related species forms a:
    A. Family
    B. Order
    C. Genus
    D. Class
    Correct Answer: C
    Explanation: Genus includes related species.
29. Correct ascending order of hierarchy is:
    A. Kingdom → Species
    B. Species → Kingdom
    C. Genus → Species
    D. Family → Species
    Correct Answer: B
    Explanation: Hierarchy ascends from species to kingdom.
30. Which category includes related genera?
    A. Species
    B. Genus
    C. Family
    D. Order
    Correct Answer: C
    Explanation: Family includes related genera.

Section D: Taxonomical Aids (MCQs 31–40)

31. A collection of dried plant specimens is called:
    A. Museum
    B. Herbarium
    C. Zoological park
    D. Botanical garden
    Correct Answer: B
    Explanation: Herbarium stores preserved plant specimens.
32. Plants grown for scientific study are kept in:
    A. Museum
    B. Herbarium
    C. Botanical garden
    D. Aquarium
    Correct Answer: C
    Explanation: Botanical gardens maintain living plants.
33. Preserved animal specimens are commonly found in:
    A. Herbarium
    B. Museum
    C. Garden
    D. Forest
    Correct Answer: B
    Explanation: Museums store preserved specimens.
34. Which taxonomical aid helps identify organisms using choices?
    A. Herbarium
    B. Museum
    C. Keys
    D. Garden
    Correct Answer: C
    Explanation: Keys use contrasting characters.
35. Zoological parks mainly help in:
    A. Plant study
    B. Animal conservation
    C. Naming organisms
    D. Writing keys
    Correct Answer: B
    Explanation: Zoological parks conserve animals.
36. Taxonomical aids are used for:
    A. Nutrition
    B. Respiration
    C. Identification
    D. Reproduction
    Correct Answer: C
    Explanation: They assist in identification and classification.
37. Herbarium specimens are:
    A. Fresh
    B. Living
    C. Dried and pressed
    D. Frozen
    Correct Answer: C
    Explanation: Herbarium specimens are dried and preserved.
38. Which aid provides living plant collections?
    A. Herbarium
    B. Museum
    C. Botanical garden
    D. Zoo
    Correct Answer: C
    Explanation: Botanical gardens maintain living plants.
39. Taxonomic keys work on the principle of:
    A. Similarities
    B. Contrasting characters
    C. Random choice
    D. Colour
    Correct Answer: B
    Explanation: Keys use paired contrasting traits.
40. Which aid is useful for public education and awareness?
    A. Herbarium
    B. Botanical garden
    C. Zoological park
    D. Key
    Correct Answer: C
    Explanation: Zoological parks educate the public about animals.

Exam Relevance

✔ Strictly NCERT-aligned
✔ Ideal for CBSE Class 11 MCQ-based assessments
✔ Concept-clearing explanations included
✔ Suitable for school exams and competitive foundations